Harvin and the Vikes are home to SF 49ers this week, while the Giants play at Tampa Bay.
I've played Harvin both weeks now, and he's done well for me, however, Smith had a monster game against Dallas, and now follows up with Tampa Bay this week.
Id take Smith because Tb's defense isnt what it used to be. they gave up 200+ yards of passing and 2 Tds to Trent Edwards, so im sure Manning can do better than that. And with smith being the consistent #1 WR on his team, I'd start him
With TB's secondary, Id play Smith. Manning loves to throw the ball and Smith is the veteran on that offense, expect to see good numbers from him this week. SF's defense is on fire right now and they're playing at home. Play Smith.